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March 2008 Calendar

CS Masters' Thesis Defense

Title: Computerized Classification of Benign and Malignant Masses using BI-RADS Descriptors
Speaker: Motoki Yoshimura
Date: Wednesday, March 26, 2008
Time: 1:00 p.m.
Location: GMCS 327
Thesis advisor: Dr Roman Swiniarski

Abstract:
According to the National Cancer Institute, approximately 20% of cancers present at the time of screening are not detected in mammograms. CAD systems have been and proposed as a method for improving the detection rate of cancers found in mammograms by aiding radiologists in detecting subtle mammographic findings which would have otherwise been overlooked.

In this thesis, we propose a two-stage classification system for automatically classifying benign and malignant masses found in mammograms. BI-RADS, which is a standardized lexicon developed by the ACR for reporting mammographic findings, is used as a guide in extracting discriminative features and as an interface between the classification system and the operating human. Using the proposed classification system, mammographic findings including the shape and margin of the massive lesion is reported as well as a pathology assessment. Using a database of 360 mammograms consisting of 180 benign and malignant cases each, we have obtained 73.3% classification accuracy with a sensitivity of 0.755.
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